CN106907292A - Wind turbine rotor blade - Google Patents
Wind turbine rotor blade Download PDFInfo
- Publication number
- CN106907292A CN106907292A CN201710009788.6A CN201710009788A CN106907292A CN 106907292 A CN106907292 A CN 106907292A CN 201710009788 A CN201710009788 A CN 201710009788A CN 106907292 A CN106907292 A CN 106907292A
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- Prior art keywords
- bending section
- rotor blade
- bend
- inboard portion
- angle
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- 238000005452 bending Methods 0.000 claims abstract description 149
- 230000008859 change Effects 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05B2240/302—Segmented or sectional blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/70—Shape
- F05B2250/71—Shape curved
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to a kind of wind turbine rotor blade.In one embodiment, rotor blade includes tip, root and the main body extended between the tip and the root.The main body have define on the pressure side, the surface of suction side, leading edge and trailing edge.The main body further defines inboard portion, Outboard Sections and the bending section between the inboard portion and the Outboard Sections.The bending section is defined as making the Outboard Sections stretch out relative to the inboard portion.The bending section is reinforced is opened with reducing bending section during rotor blade deflection.
Description
The application is the patent application " wind turbine rotor blade " that on December 15th, 2011 submits to（Application number：
201110437091.1, applicant：General Electric Co. Limited）Divisional application.
Technical field
This patent disclosure relates generally to wind turbine rotor blade, and relate more specifically to that there are the various tower clearances of offer
The rotor blade of the feature of advantage.
Background technology
Wind-force is considered as currently available most cleaning, most one of eco-friendly power source, and makes wind turbine with regard to this point
Obtain increasing concern.Modern wind turbine generally include pylon, generator, gear-box, cabin and one or more
Rotor blade.Rotor blade is using known fin principle（foil principle）Capture the kinetic energy of wind.Rotor blade will turn
The kinetic energy that the axle for making coupled rotor blade of kinetic energy form rotates is transferred to gear-box, or is not using the feelings of gear-box
Generator is transferred directly under condition.Then, generator converts mechanical energy into the electric energy that can apply to utility network.
Generally, the design of rotor blade is limited by the gap threshold distance with pylon apart.For example, in wind turbine
During machine runs, rotor blade may be deflected towards pylon.Touched with pylon and damage wind-force whirlpool to reduce rotor blade
The danger of turbine, each certification regulation requires, rotor blade layout is no more than e.g., from about three points into taking when rotor blade deflection
Two quiet clearance distance.Generally, quiet clearance distance is the non-deflection distance between vane tip and pylon.
So, it is desirable to gap threshold distance limit the design and performance of commonly known rotor blade.For the limit
The scheme of the known of system includes, for example, overall wing chord is combined in the rotor blade away from pylon to curve,
Regulation inclination angle, makes hub tapered, and/or makes tapered at the root of rotor blade.However, in the rotor of these prior arts
In the extreme deflection of blade, the action of rotor blade is generally similar to beam, despite the presence of wing chord to bending section, but rotor leaf
The sophisticated meeting " opening " of piece and pylon may be clashed into.
Accordingly, it would be desirable to be used for the improved rotor blade of wind turbine.Specifically, it is a kind of to have in raising rotor blade
Can be maintained while performance the improvement feature of suitable tower clearance rotor blade would is that it is advantageous.
The content of the invention
Aspects and advantages of the present invention will be illustrated partly in the following description, or can be become by explanation
It is clear that or can be recognized by implementation of the invention.
In one embodiment, a kind of rotor blade for wind turbine is disclosed.The rotor blade include tip,
Root and the main body extended between tip and root.The main body have define on the pressure side, suction side, leading edge and trailing edge
Surface.The main body further defines inboard portion, Outboard Sections and the bending section between inboard portion and Outboard Sections.Bending
Part is defined as making Outboard Sections stretch out relative to inboard portion.Bending section is reinforced and is being turned with reducing bending section
Blades open during deflecting.
The bending section defines an angle of bend less than or equal to about 20 degree, or one is less than or equal to
About 15 degree of angle of bend.The bending section has between about the 50% and about 100% of a span in the rotor blade
Span direction position between span direction position, or with a span in the rotor blade about 60% and about 95%
Put.The inboard portion of the main body bends generally outwards, and the Outboard Sections bend generally outwards.
Further, the bending section defines an angle of bend and span direction position, wherein, a tip
Distance is defined by described sophisticated and described inboard portion, and wherein, the angle of bend and span direction position are constructed
Into making the distance between two tips between about 5 meters with about 1 meter, or the angle of bend and span direction position quilt
It is configured to make the distance between two tips between about 3 meters with about 1 meter.The bending section is configurable to make outside described
Side part is roughly parallel to pylon during the design maximum deflection of the rotor blade.The bending section defines a song
Rate radius, and wherein, the radius of curvature is between about 1600 millimeters with about 3000 millimeters, or the curvature
Radius can be between about 1750 millimeters with about 2500 millimeters.The rotor blade also includes that multiple is prolonged at least in part
Stretch through the bending section and the inside strip beam for being configured to strengthen the bending section.The rotor blade is also wrapped
Include a branch sleeve being arranged between the inboard portion and the Outboard Sections, at least part of boundary of a piece of land of branch sleeve
Determine the bending section and be configured to strengthen the bending section.
The present invention also provides a kind of wind turbine, including：Multiple rotor blades, in the multiple rotor blade at least
One includes：One tip；One root；And a main body, it extends and has between described sophisticated and described root
The surface of bounded constant-pressure side, suction side, leading edge and trailing edge, the main body further defines inboard portion, Outboard Sections and in institute
The bending section between inboard portion and the Outboard Sections is stated, the bending section is defined as making the Outboard Sections relative
Stretch out in the inboard portion, wherein, the bending section is reinforced to reduce the bending section in the rotor leaf
Piece opens during deflecting.
The bending section defines an angle of bend less than or equal to about 20 degree.Further, the bending section
Divide and define an angle of bend and span direction position, wherein, a distance between two tips are by described sophisticated and described inside portion
Boundary is fixed, and wherein, the angle of bend and span direction position be constructed such that the distance between two tips about 5 meters with about
Between 1 meter.The bending section defines a radius of curvature, and wherein, the radius of curvature is about 1600
Millimeter with about 3000 millimeters between.The rotor blade also includes that multiple extends through the bending at least in part
Partly and it is configured to strengthen the inside strip beam of the bending section.The rotor blade is also arranged on institute including one
The branch sleeve between inboard portion and the Outboard Sections is stated, the branch sleeve defines the bending section at least in part
Divide and be configured to strengthen the bending section.
These and other features of the invention, aspect and excellent are better understood with reference to following explanation and claim
Point.Comprising in this specification and the accompanying drawing of the part that constitutes the specification shows embodiments of the present invention, and with
Illustrate to be used to explain principle of the invention together.
Brief description of the drawings
Illustrate referring to the drawings in this specification of the invention including its best mode and to ordinary skill people
The complete and possible disclosure that member is instructed, in the accompanying drawings：
Fig. 1 shows the perspective view of conventional wind turbine；
Fig. 2 is the side view of rotor blade according to an embodiment of the invention；
Fig. 3 is the partial enlarged drawing of the rotor blade according to an embodiment of the invention shown in Fig. 2；
Fig. 4 is the side view of rotor blade according to an embodiment of the invention, is specifically illustrated in non-deflection/unloading position
And the rotor blade in deflection/loading position, and these positions are compared with the position of convention rotor blade；
Fig. 5 is the one according to an embodiment of the invention rotor blade for including various reinforcement features along Fig. 2 center lines 5--5
Sectional elevation；
Fig. 6 is according to another embodiment of the invention one rotor blade for including various reinforcement features along Fig. 2 center lines 6--
6 sectional elevation；
Fig. 7 is the perspective view of the rotor blade including various reinforcement features according to another embodiment of the invention；And,
Fig. 8 is along Fig. 7 center lines 8--8 according to one of the embodiment as shown in Figure 7 rotor blade for including various stiffeners
Sectional elevation.
Specific embodiment
Embodiments of the present invention are reference will now be made in detail to now, one or more example is shown in the drawings.Offer is respectively shown
Example, to explain the present invention, is not to limit the present invention.In fact, it will be readily apparent to one skilled in the art that not carrying on the back
Various changes and modification can be made to the present invention on the premise of the scope of the present invention or spirit.For example, as a reality
Apply shown by a part for example or the feature of description can be used together to produce another embodiment party with another embodiment
Formula.Hence, it can be determined that, the present invention covering fall within the scope of the appended claims these change and modification and they
Equivalent.
Fig. 1 show a kind of wind turbine 10 of conventional configurations.Wind turbine 10 includes pylon 12, and cabin 14 is installed
On pylon 12.Multiple rotor blades 16 are arranged in rotor hub 18, and main flange of the rotor hub 18 again with rotation main rotor shaft connects
Connect.The generating of wind turbine and control unit are contained in cabin 14.For illustrative purpose, there is provided the view of Fig. 1, only
In placing this invention into the exemplary fields of purposes.It should be understood that the invention is not limited in the wind-force of any particular type
Turbine constructions.
During the operation of wind turbine 10, wind is from the impact rotor blade 16 of direction 20（Referring to Fig. 2）, cause rotor leaf
Piece 16 rotates around rotation axis.When rotor blade 16 is rotated and subjected to centrifugal force, rotor blade 16 be also subjected to various power and
Bending moment.Therefore, rotor blade 16 can from centre or non-deflected posi-tion deflect to a deflection or loading position
Put, thus reduce the tower clearance between blade 16 and pylon 12.In order to monitor the position of blade 16 and reduce tower strike
Possibility, predetermined tower clearance threshold value 22 can be set up（Fig. 2 and Fig. 4）.So, if one or more in blade 16 are inclined
Turn to exceed the tower clearance threshold value 22, corrective action can be taken（Such as pitch of regulation blade 16 or change cabin 14
Inclination angle）To increase pylon 12 and blade（Can be multiple）Interval between 16.As used in this specification, term
" tower clearance threshold value " generally corresponds to the minimum range apart with pylon 12, operation of the rotor blade 16 in wind turbine 10
Period is maintained at the threshold value, so as to reduce the possibility of tower strike.So, it should be understood that tower clearance threshold value 22 can
Change with because of different between wind turbine and wind turbine, this depends on length, the rotor leaf of such as rotor blade
The flexibility/stiffness of piece, and/or the expected service condition of wind turbine.Further, it should be understood that wind-force can be based on
Each certification rule of turbine 10 changes tower clearance threshold value 22.For example, certification rule can require tower clearance threshold value
22 is about 1/3rd of the quiet clearance distance of rotor blade 16.As used in this specification, term " quiet clearance gap
From " be commonly referred to as on pylon 12 and rotor blade during deflecting near the non-deflection distance between the point of pylon 12.
Referring now to Fig. 2, the side view of one embodiment of rotor blade 16 for wind turbine 10 is shown.Such as
Shown in figure, rotor blade 16 includes being used for blade 16 is arranged on into hub 18（Fig. 1）On root 32.Rotor blade 16 also includes setting
Put at the tip 34 of the end relative with root 32 of blade 16.The main body 40 of rotor blade 16 is substantially in root 32 and point
End 34 between extend, and with define on the pressure side 42 and suction side 44 surface, on the pressure side 42 and suction side 44 in leading edge 46
With trailing edge 48（Referring to Fig. 5 to Fig. 8）Between extend.
Fig. 2 also illustrates the span 50 of rotor blade 16.Be as known in the art, span 50 be typically rotor blade 16 from
The length at root 32 to tip 34.After this manner, root 32 can limit 0% span, and tip 34 can limit 100% span.
It should be understood that rotor blade 16 can generally have any suitable span 50.For example, in one embodiment, rotor leaf
Piece 40 can have the span of scope from about 15 meters to about 91 meters, for example, from about 20 meters to about 85 meters, or from about 40 meters to
About 55 meters, and all other subranges between 15 meters to 91 meters.However, other non-limiting examples can include being less than
15 meters or the span more than 91 meters.
As disclosed above, rotor blade of the invention 16 is preferably included in be allowed to be tieed up while improving performance
Hold the improved feature of tower clearance threshold value 22.So, rotor blade of the invention 16 can define inboard portion 62, outer
Side part 64 and the bending section between inboard portion 62 and Outboard Sections 64 66.Generally, bending section 66 can be defined
And separate inboard portion 62 and Outboard Sections 64.Therefore, inboard portion 62 can be main body 40 in root 32 and bending section
The part extended between 66, Outboard Sections 64 can be the part extended between bending section 66 and tip 34 of main body 40.
To state as follows, bending section 66 can be such that tip 34 is moved away from pylon 12.Further, it is as described below, bending can be strengthened
Part 66 with reduce or eliminate bending section during the deflection of rotor blade 16/process opens.So, bending section 66 can
Advantageously to represent the point closest to pylon 12.This is advantageouslyed allow for for example will on the pressure side or suction side winglet increases to rotor
On blade 16, or rotor blade 16 can be allowed to be designed to become smaller and more while tower clearance threshold value needed for maintaining
Gently.
Inboard portion 62 and Outboard Sections 64 may each be substantial linear, or generally curved in the exemplary embodiment
Bent.The bending of rotor blade 16（Such as bending of inboard portion 62 and Outboard Sections 64）Need along generally chord-wise direction and/
Or along substantially aerofoil direction bending rotor blade 16.Chordwise（flapwise direction）Generally it is construed to airlift
Act on the direction on rotor blade 16（Or opposite direction）.In other words, inboard portion 62 or the edge of Outboard Sections 64
The bending of chordwise generally is construed to be bent outwardly away from pylon 12 or curved inwardly towards pylon 12.If wind turbine
Machine 10 is upwind turbine, is bent outwardly and refers to along on the pressure side 42 direction bending, and curves inwardly and refer to along suction
The direction bending of side 44.If wind turbine 10 is lower wind direction turbine, the direction referred to along suction side 44 is bent outwardly
Bending, and curve inwardly and refer to along on the pressure side 42 direction bending.Aerofoil direction（edgewise direction）Generally hang down
Directly in chordwise.In other words, inboard portion 62 or Outboard Sections 64 are generally construed to along preceding along the bending in aerofoil direction
The direction of edge 46 or the direction bending along trailing edge 48.The wing chord of rotor blade 16 is also called prebuckling to bending, and aerofoil
It is also called to bending and is scanned（sweep）.So, the rotor blade 16 of bending can be prebuckling and/or scan.Bending makes to turn
Blades 16 can preferably be born during the operation of wind turbine 10 wing chord to aerofoil to load, and in some realities
Apply in example, can be provided and the certain interval and pylon apart of pylon 12 for rotor blade 16 during wind turbine 10 runs
Gap threshold 22.
Further, the bending section 66 defined between inboard portion 62 and Outboard Sections 64 can be defined as, outside
Part 64 stretches out relative to inboard portion 62.If for example, wind turbine 10 is upwind turbine, then bending section
Points 66 can be defined as, Outboard Sections 64 relative to inboard portion 62 along blade 16 on the pressure side 42 direction stretch out.Such as
Fruit wind turbine 10 is lower wind direction turbine, then bending section 66 can be defined as, and Outboard Sections 64 are relative to inside portion
62 are divided to stretch out along the direction of the suction side 44 of blade 16.So, as shown in Fig. 2 it shows a upwind turbine, outward
Side part 64 can extend from bending section 66 relative to inboard portion 62 away from the ground of pylon 12.It should be understood that such as in this theory
The term " bending " used in bright book and " curved " can include curved as depicted（For example, with smooth edge as special
The bending that the bending or offer levied smoothly transit a little）, and angle bending（For example, be characterized with the edge crossed in certain point
Bending or the bending of offer racing transition point）.
Referring now to Fig. 3, the partial enlarged drawing of the rotor blade 40 shown in Fig. 2 is shown.As illustrated, bending section 66
An angle of bend 68 can be defined.Angle of bend 68 can be inboard portion 62 and the adjacent bends point 66 of adjacent bends point 66
Outboard Sections 64 between angle.Generally, angle of bend 68 can be chosen to, and Outboard Sections 64 is sufficiently apart from the ground of pylon 12 and prolong
Stretch.For example, in one embodiment, angle of bend 68 can be less than or equal to about 20 degree, or between about 0 degree and about 20 degree
In the range of.Or, angle of bend 68 can be less than or equal to about 15 degree, or between about 0 and about 15 degree.Or
Person, angle of bend 68 can be less than or equal to about 10 degree, or between about 0 and about 10 degree.It should be understood, however, that
It is that bending section 66 is not limited by angle of bend disclosed above 68, but any suitable angle of bend 68 is of the invention
In scope and spirit.Further, it should be understood that for each rotor blade configuration, angle of bend 68 would generally basis
Several factors and change, these factors include but is not limited to span direction position 70 of the bending section 66 along span 50,
Bending section 66 is defined in rotor blade 16 at the position.For example, it is as described below, with the span direction of bending section 66
Further moved to tip 34 position 70, it may be necessary to increase angle of bend 68, vice versa.
As described above, bending section 66 can have span direction position 70 relative to the span 50 of rotor blade 16.
In some embodiments, bending section 66 can have the span between about the 50% and about 100% of the span 50 of rotor blade 16
Direction position 70.Or, bending section 66 can have between about the 60% and about 100% of the span 50 of rotor blade 16 or
Span direction position 70 of the person between 60% and about 95%.Or, bending section 66 can have the span in rotor blade 16
Span direction position 70 between about the 66% of 50 and about 100% or between 66% and about 95%.However, it should be understood that curved
Bent portions 66 are not limited to span direction position 70 disclosed above, but any suitable span direction position 70 at this
In the scope and spirit of invention.Further, it should be understood that for each rotor blade configuration, angle of bend 68 is usual
Can be changed according to several factors, these factors include but is not limited to angle of bend 68.For example, it is as described below, with angle of bend
68 increase, and the span direction position 70 of bending section 66 may need further to be moved to tip 34, and vice versa.
Referring now to Fig. 4, such as the rotor blade 16 for defining bending section 66 described in this specification is shown
Individual embodiment is in non-deflection/unloading position 80 and deflection/loading position 82.In order to be compared, further it is shown that it is conventional without
The rotor blade 84 for having bending section 66 is in non-deflection/unloading position 86 and deflection/loading position 88.As illustrated, inclined
Between the refunding, the point closest to tower clearance threshold value 22 of the convention rotor blade of such as rotor blade 84 in inflection point 88
It is probably the tip of that rotor blade.Advantageously, rotor blade of the invention 16 can migrate rotor comprising bending section 66
Point of the blade 16 closest to tower clearance threshold value 22.Therefore, during deflecting, the rotor blade 16 in inflection point 82 most connects
The point of nearly tower clearance threshold value 22 can be bending section 66.
As illustrated, rotor blade 16 can define distance between two tips 90.Distance between two tips 90 can be by the point of rotor blade 16
End 34 and inboard portion 62 are defined.For example, distance between two tips 90 in non-deflected posi-tion 80 or in inflection point 82 can be with
Be tip 34 with extend to tip in the no bending section 66 of rotor blade 16 and inboard portion 62 in the case of it is sophisticated
The distance between position.In other words, distance between two tips 90 can be in non-deflected posi-tion 80 or in inflection point 82
Tip 34, and the convention rotor blade 84 in non-deflected posi-tion 86 or in inflection point 84 for comparing tip between
Distance.Distance between two tips 90 can represent the desired additional distance at a tip 34 and the interval of tower clearance threshold value 22.
As described above, the angle of bend 68 of bending section 66 and span direction position 70 can change, and one can be entered
Walk interrelated and be relatively and change basicly.In certain embodiments, angle of bend 68 and span direction position
70, and/or other each factors can be configured to produce specific distance between two tips 90.For example, angle of bend 68 and span direction position
Putting 70 can be adjusted to produce a specific distance between two tips 90.Distance between two tips 90 can be for example about 5 meters with about 1 meter it
Between or about 5 meters with about 1.5 meters between.Or, distance between two tips 90 can be about 3 meters with about 1 meter or
Between about 3 meters with about 1.5 meters.Or, distance between two tips 90 can be between about 2.5 meters and about 1 meter or
Between about 2.5 meters and about 1.5 meters.Scope disclosed above on distance between two tips 90 can be applied in non-deflection position
Put 80 or inflection point 82.However, it should be understood that the invention is not limited in distance between two tips disclosed above 90, but
Any suitable distance between two tips 90 are within the scope and spirit of.
Further, in some exemplary embodiments, bending section 66 can be configured to, and Outboard Sections 64 are in blade 16
Deflection during it is generally parallel with pylon 12, such as the center line 92 with pylon 12 is parallel.For example, the angle of bend of bending section 66
68th, span direction position 70, and/or other each factors can be designed to：Outboard Sections 64 lead to during maximum deflection is designed
Often become parallel with pylon.Design maximum deflection can design inclined under the certain maximum load born in rotor blade 16
Turn.For example, design maximum deflection can be represented by the inflection point 82 of rotor blade 16 in fig. 4.
As set forth above, it is possible to strengthen bending section 66 to reduce or eliminate deflection of the bending section 66 in rotor blade 16
Period opens.As used in this specification, " the opening " of bending section 66 refers to extension bending section 66 and causes bending
Angle 68 reduces.According to required reduction or opening for bending section 66 can be eliminated, so, in the deflection phase of rotor blade 16
Between, bending section 66 is still the point closest to tower clearance threshold value 22.（If it should be understood that during deflecting, outside portion
Points 64 generally parallel with pylon 12, then bending section 66 is still considered along the immediate of Outboard Sections 64
Point.）Further, in the exemplary embodiment, opening on bending section 66, rotor blade 16 and bending section 66 can be with
It is configured to：Some parts of bending section 66 are maintained during deflecting, and/or is configured to：Outboard Sections 64 generally not with tower
Frame gap threshold 22 intersects.If it is clear that not reducing or eliminating opening for bending section 66, then angle of bend 68 can be with
Zero or negative angle are decreased to, tip 34 can extend beyond bending section 66 and can exceed that tower clearance threshold value 22, so that
Increase is contacted with pylon 12 and may violate the risk of each certification rule.Therefore, it can the bending for strengthening being invented according to book
Opened with reducing or preventing part 66.
In certain embodiments, for example, bending section 66 can have curvature 100 within the specific limits（Referring to Fig. 3 and
Fig. 8）Radius, the radial design into strengthen bending section 66 and reduce or prevent bending section 66 in rotor blade 16
Opened during deflection.For example, the radius of curvature 100 can be between about 1600 millimeters and about 3000 millimeters, or about 1600
Millimeter with about 2500 millimeters between.Or, radius of curvature can between about 1750 millimeters and about 3000 millimeters or
Person is between about 1750 millimeters with about 2500 millimeters.Advantageously show that these exemplary scopes can be strengthened
Simultaneously reduce or prevent bending section 66 from being opened during the deflection of rotor blade 16 in bending section 66.
In alternative embodiment, rotor blade of the invention 16 can include for strengthen bending section 66 and
Reduce or prevent the various reinforcement features that bending section 66 is opened during the deflection of rotor blade 16.For example, such as Fig. 5 and Tu
Shown in 6, in some embodiments, rotor blade 16 can include multiple internal strip beams 110.Strip beam can typically increase
Plus the internals that the rigidity of rotor blade 16, and/or interior other internal structures of rotor blade 16 of being easy to are installed.As illustrated, long
Bar beam 110 can be arranged in pairs in the inside of the main body 40 of rotor blade 16, and a strip beam 110 is configured on the pressure side 42,
Another strip beam 110 is configured in suction side 44.Further, one or more pairs of strip beams 110 can be arranged on rotor blade
16 inside.For example, as illustrated, a pair of strip beams 110 can be arranged near leading edge 46, and another strip beam 110 is close to
Trailing edge 46 is arranged.In the exemplary embodiment, can by by the co-implanted rotor blade 16 of strip beam 110 by strip beam
110 configurations are in the inside of rotor blade 16.It should be understood that strip beam 110 can as required have any suitable arrangement
And/or construct suitably to strengthen bending section 66.
Strip beam 110 can at least in part extend through bending section 66.For example, in the exemplary embodiment, strip
Beam 110 can extend through bending section 66, and enter inboard portion 62 and/or Outboard Sections 64.Strip in rotor blade 12
The construction of beam 110 can strengthen bending section 66, and reduce or prevent bending section 66 from opening.
In certain embodiments, as shown in Figure 5 and Figure 6, rib 112 or multiple ribs 112 can be arranged on a pair of strip beams
Between 110, and strengthening bending section 66 on strip beam 110.For example, as shown in the figure 5, rib 112 can be at a pair
Extend between strip beam 110, and can be bonded on strip beam 110 using suitable adhesive 114.As needed or
Person requires that rib 112 can be bonded to strip beam 110 on the side of rib 112 or both sides.Additionally or alternatively,
As shown in the figure 6, rib 112 can extend between a pair of strip beams 110, and can use suitable mechanical fastening device 116
（For example, nut-bolt sub-assembly, riveting, screw or spike）Secure it within strip beam 110.
In other embodiments, cable wire（It is not shown）Or any other suitable reinforcement or bracing means can be with length
Bar beam 110 is used together, or replaces strip beam 110 suitably to strengthen bending section 66.
In other embodiments, as shown in Figure 5 and Figure 6, a pair of strip beams 110 may be mounted at together to strengthen bending section
Divide 66.For example, as shown in figure 5, a pair of strip beams 110 can be bonded together using suitable bonding agent 114.Strip beam
110 can as needed or requirement bonded together in side or both sides.Additionally or alternatively, such as Fig. 6 institutes
Show, suitable mechanical fastening device 116 can be used（For example, nut-bolt sub-assembly, riveting, screw or spike）Will
A pair of strip beams 110 tighten together.
So, as it can be seen in figures 5 and 6, strip beam 110 can be configured to strengthen bending section 66, and reduce or prevent
Opened during deflecting bending section 66.Further, advantageously, strip beam 110 and rib 112（If desired）Can be bonded
And/or be tightened to：When rotor blade is subjected to various stress during deflecting, between strip beam 110 or in strip beam 100
Bonding or fastening between rib 112 may suffer from shearing, rather than pulling force.By being bonded and/or fastening, strip beam
110 or strip beam 100 and rib 112 sheared during deflecting, advantageously generate stronger bonding or fastening.
In other embodiments, as shown in Figure 7 and Figure 8, rotor blade 16 can include branch sleeve 120.Branch sleeve
120 can be arranged between inboard portion 62 and Outboard Sections 64.Further, branch sleeve 120 can at least part of boundary of a piece of land
Determine bending section 66, and can be configured to strengthen bending section 66.
For example, branch sleeve 120 can include inner surface 122 and outer surface 124.Outer surface 124 can be at least in part
Bending section is defined, and can further be had corresponding with the aerodynamic profile of inboard portion 62 and Outboard Sections 64 pneumatic
Profile so that inboard portion 62, branch sleeve 120 and Outboard Sections 64 form define on the pressure side 42, suction side 44, leading edge 46
With the continuous pneumatic surface of trailing edge 48.
Branch sleeve 120 is typically mounted on inboard portion 62 and Outboard Sections 64.Therefore, the end of inboard portion 62
132 and the end 134 of Outboard Sections 64 can be configured to be engaged with branch sleeve 120 that branch sleeve 120 is installed.In some realities
In applying example, as shown in figure 8, end 132 and 134 can be configured to be engaged with the inner surface 122 of branch sleeve 120.Can pass through
Use for example suitable binding agent（It is not shown）Or suitable mechanical fastening device 138（For example, nut-bolt sub-assembly, riveting
Connect, screw or spike）End 132 and 134 and branch sleeve 120 are installed together.
Branch sleeve 120 advantageously can reinforce rotor blade 16 in the position of bending section 66.For example, branch sleeve
120 can be formed by a kind of stronger material of material of the remainder than for forming main body 40, or can be included various
Separating device strengthens feature 140, separates and reinforce rotor blade 16, Huo Zheke inboard portion 62 and Outboard Sections 64
With including any other suitable feature for reinforcing rotor blade 16.
In certain embodiments, bending section 66 can be all defined in branch sleeve 120.Further, at these
In some in embodiment, the radius of the curvature 100 of bending section 66 can be designed to strengthen bending section 66 and reduce or
Person is prevented in the certain limit that bending section 66 is opened during the deflection of rotor blade 16.For example, a connection can be defined
Maximum gauge 142 of the sleeve 120 at bending section 66.Can be on the pressure side the 42 and suction of the cross section of branch sleeve 120
Maximum gauge 142 is measured at most thick tangential between side 44.In certain embodiments, the radius of curvature 100 can be more than or
Person is equal to 1/2nd of maximum gauge 142.Advantageously show that the exemplary range can strengthen bending section 66, and reduced
Or prevent bending section 66 from being opened during the deflection of rotor blade 16.
The specification uses examples to the open present invention（Including best mode）, and also enable those skilled in the art
Implement the present invention（Including manufacturing and using any device or system and implementing any included method）.It is of the invention can
The scope of the claims is defined by the claims, and the other examples that can be expected including those skilled in the art.If these other
Example includes the literal language identical structural element with claim, or if they include the literal language with claim
The equivalent structural elements without substantive difference are sayed, then they are considered to fall into the range of claim.
Claims (20)
1. a kind of rotor blade for wind turbine, the rotor blade includes：
Tip；
Root；And
Main body, its extend between described sophisticated and described root and with define on the pressure side, suction side, leading edge and trailing edge
Surface, the main body also defines inboard portion, Outboard Sections and bending section between them, the outside portion subpackage
Include the tip, the bending section be defined as so that the whole Outboard Sections relative to the inboard portion to extension
Stretch,
Wherein, the bending section is reinforced to reduce the bending section opening during the rotor blade deflection.
2. rotor blade according to claim 1, it is characterised in that define less than or equal to about 20 bending section
The angle of bend of degree.
3. rotor blade according to claim 1, it is characterised in that define less than or equal to about 15 bending section
The angle of bend of degree.
4. rotor blade according to claim 1, it is characterised in that the bending section has in the rotor blade
Span direction position between about the 50% of span and about 100%.
5. rotor blade according to claim 1, it is characterised in that the bending section has in the rotor blade
Span direction position between about the 60% of span and about 95%.
6. rotor blade according to claim 1, it is characterised in that the inboard portion of the main body is curved generally outwards
It is bent.
7. rotor blade according to claim 1, it is characterised in that the Outboard Sections of the main body are curved generally outwards
It is bent.
8. rotor blade according to claim 1, it is characterised in that define angle of bend and span direction in the bending section
Position, wherein, distance between two tips are defined by described sophisticated and described inboard portion, and wherein, the angle of bend and the span
Direction position is constructed such that the distance between two tips between about 5 meters with about 1 meter.
9. rotor blade according to claim 1, it is characterised in that define angle of bend and span direction in the bending section
Position, wherein, distance between two tips are defined by described sophisticated and described inboard portion, and wherein, the angle of bend and the span
Direction position is constructed such that the distance between two tips between about 3 meters with about 1 meter.
10. rotor blade according to claim 1, it is characterised in that the bending section is constructed such that described outer
Side part is roughly parallel to pylon during the design maximum deflection of the rotor blade.
11. rotor blades according to claim 1, it is characterised in that define radius of curvature, and its in the bending section
In, the radius of curvature is between about 1600 millimeters with about 3000 millimeters.
12. rotor blades according to claim 1, it is characterised in that define radius of curvature, and its in the bending section
In, the radius of curvature is between about 1750 millimeters with about 2500 millimeters.
13. rotor blades according to claim 1, it is characterised in that the rotor blade also includes multiple at least part of
Extend through the bending section and be configured to strengthen the inside strip beam of the bending section.
14. rotor blades according to claim 1, it is characterised in that the rotor blade also includes being arranged in described
Branch sleeve between side part and the Outboard Sections, the branch sleeve defines the bending section and quilt at least in part
It is configured to strengthen the bending section.
A kind of 15. wind turbines, including：
At least one of multiple rotor blades, the multiple rotor blade include：
Tip；
Root；And
Main body, its extend between described sophisticated and described root and with define on the pressure side, suction side, leading edge and trailing edge
Surface, the main body also defines inboard portion, Outboard Sections and bending section between them, and the Outboard Sections include
The tip, the bending section is defined as so that the whole Outboard Sections stretch out relative to the inboard portion,
Wherein, the bending section is reinforced to reduce the bending section opening during the rotor blade deflection.
16. wind turbines according to claim 15, it is characterised in that define and be less than or equal in the bending section
About 20 degree of angle of bend.
17. wind turbines according to claim 15, it is characterised in that define angle of bend and span in the bending section
Direction position, wherein, distance between two tips are defined by described sophisticated and described inboard portion, and wherein, the angle of bend and described
Span direction position is constructed such that the distance between two tips between about 5 meters with about 1 meter.
18. wind turbines according to claim 15, it is characterised in that radius of curvature is defined in the bending section, and
And wherein, the radius of curvature is between about 1600 millimeters with about 3000 millimeters.
19. wind turbines according to claim 15, it is characterised in that the rotor blade also includes multiple at least portions
Extend through the bending section and be configured to strengthen the inside strip beam of the bending section with dividing.
20. wind turbines according to claim 15, it is characterised in that the rotor blade is also described including being arranged on
Branch sleeve between inboard portion and the Outboard Sections, the branch sleeve define at least in part the bending section and
It is configured to strengthen the bending section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/968739 | 2010-12-15 | ||
| US12/968,739 US8317483B2 (en) | 2010-12-15 | 2010-12-15 | Wind turbine rotor blade |
| CN2011104370911A CN102588204A (en) | 2010-12-15 | 2011-12-15 | Wind turbine rotor blade |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104370911A Division CN102588204A (en) | 2010-12-15 | 2011-12-15 | Wind turbine rotor blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106907292A true CN106907292A (en) | 2017-06-30 |
| CN106907292B CN106907292B (en) | 2021-09-24 |
Family
ID=44560172
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104370911A Pending CN102588204A (en) | 2010-12-15 | 2011-12-15 | Wind turbine rotor blade |
| CN201710009788.6A Active CN106907292B (en) | 2010-12-15 | 2011-12-15 | Wind turbine rotor blade |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104370911A Pending CN102588204A (en) | 2010-12-15 | 2011-12-15 | Wind turbine rotor blade |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8317483B2 (en) |
| CN (2) | CN102588204A (en) |
| DE (1) | DE102011056353A1 (en) |
| DK (1) | DK178555B1 (en) |
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| ES2716309T3 (en) * | 2012-11-15 | 2019-06-11 | Wobben Properties Gmbh | Rotor blade tip and manufacturing procedure |
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| DK2857675T3 (en) * | 2013-10-07 | 2017-02-27 | Siemens Ag | Design of a curved rotor blade |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102011056353A1 (en) | 2012-06-21 |
| DK201170702A (en) | 2012-06-16 |
| CN102588204A (en) | 2012-07-18 |
| DK178555B1 (en) | 2016-06-13 |
| CN106907292B (en) | 2021-09-24 |
| US8317483B2 (en) | 2012-11-27 |
| US20110223034A1 (en) | 2011-09-15 |
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Effective date of registration: 20240229 Address after: Danish spirit Patentee after: LM Wind Power A/S Country or region after: Denmark Address before: New York, United States Patentee before: General Electric Co. Country or region before: U.S.A. |